How to deal with individual sockets in socket.io?

Question

Node.js

Hello.

There is such a Socket.io room in which there are two users. The first column always shows
its name (already implemented), but the second column should show the name of the second socket.
But I don't know how to transfer the username of one user to another, please help.



This is how I connect the socket to the room and assign my name to the player1 variable,
which is shown in the first column.

socket.on('JoinToBet', data => {
    socket.join(data.url)
    socket.emit('Players', {
       player1: session.user.login,
       player2: // как узнать???
    })
})

But now I want to create a player2 variable where the name of the second user will be